CN107230697A - Substrate with dot structure, photoelectric device and Method of printing containing it - Google Patents
Substrate with dot structure, photoelectric device and Method of printing containing it Download PDFInfo
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- CN107230697A CN107230697A CN201710344849.4A CN201710344849A CN107230697A CN 107230697 A CN107230697 A CN 107230697A CN 201710344849 A CN201710344849 A CN 201710344849A CN 107230697 A CN107230697 A CN 107230697A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/17—Passive-matrix OLED displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/12—Deposition of organic active material using liquid deposition, e.g. spin coating
- H10K71/13—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing
- H10K71/135—Deposition of organic active material using liquid deposition, e.g. spin coating using printing techniques, e.g. ink-jet printing or screen printing using ink-jet printing
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- Electroluminescent Light Sources (AREA)
Abstract
This application provides a kind of substrate with dot structure, photoelectric device and Method of printing containing it.There is the dot structure in the substrate of dot structure to include the pixel cell with sub-pixel for this, each sub-pixel includes pixel isolation region and light-emitting zone, the depression region that light-emitting zone surrounds for the pixel isolation structure and substrate positioned at pixel isolation region, it is recessed for the fluent material for holding inkjet-printing device ejection, depression bottom surface is shaped as the first planar graph S1, 1≤S2 area/S1 area≤1.5, and S2 and S1 has common factor, occur simultaneously for S1, S2 is inkjet-printing device in the fluent material with single printing ejection under test substrate distance certain height, the second planar graph formed after being dried on the flat surfaces of test substrate, it is the electrically-conductive backing plate for being not provided with pixel isolation Rotating fields to test substrate.The application realizes the effect of the membrane uniformity and luminescent device uniformity of luminance that improve light-emitting zone.
Description
Technical field
The application is related to pixel design field, in particular to a kind of substrate with dot structure, containing it
Photoelectric device and Method of printing.
Background technology
In recent years, solwution method, which gradually substituted traditional vapour deposition method, turns into the study hotspot for making electroluminescent device, makes
The process of electroluminescent device mainly includes setting corresponding function ink into corresponding pixel, and general pixel includes pixel circle
Given layer and light-emitting zone, light-emitting zone are the pits that pixel defining layer and substrate are surrounded, and the pit is used to hold ink, ink dries
Each film layer (each functional layer and luminescent layer) is formed after dry, each film layer constitutes luminescent device with upper/lower electrode.
Ink-jet printing process in solwution method is considered as most prospect because being applicable to the production of extensive luminescent device
One of method.But the luminescent device prepared by existing ink-jet printing process is easy due to the limitation that pixel light emission region is designed
There is the uneven phenomenon of film layer.Existing light-emitting zone generally rounded rectangle, as shown in figure 1, light-emitting zone 1 ' is by pixel
Define layer 2 ' to keep apart, the volume that light-emitting zone 1 ' can accommodate ink is relatively large, it is necessary to which printing device prints many melted inks 3 '
In light-emitting zone, to meet setting requirements, in the process due to the ink droplet of printing have in light-emitting zone it is overlapping, it is necessary to by
Ink droplet it is natural flowing and sprawl, often occur ink droplet blank at two up and down (approximate half-circular) of light-emitting zone, or go out
Present crossover sites ink solids are higher than the phenomenon at non-crossing position, and it is uneven that such light-emitting zone design can aggravate film layer
Degree, and the uneven luminescent properties that can often cause device of film layer are reduced.
Have in the prior art by adjusting the formula of ink to improve the scheme that film layer is uneven, but improvement is not
Ideal, the conditioning agent for adjusting formula may bring harmful effect to performances such as the luminous and conductions of luminescent device in itself, this
Outside, the complexity that ink configures technique can also be increased due to introducing regulation technique.
Still needed to from the foregoing, it will be observed that the problem of film layer is uneven easily occurs in the luminescent device prepared by existing ink-jet printing process
Further research and solve.
The content of the invention
The main purpose of the application is to provide a kind of substrate with dot structure, the photoelectric device containing it and printing side
, easily there is the problem of film layer is uneven to solve the luminescent device prepared by existing ink-jet printing process in method.
To achieve these goals, according to the one side of the application there is provided a kind of substrate with dot structure, as
Plain structure includes one or more pixel cells, and each pixel cell includes one or more sub-pixels, and each sub-pixel includes
Pixel isolation structure is provided with pixel isolation region and light-emitting zone, the corresponding substrate in pixel isolation region, light-emitting zone is
The depression region that pixel isolation structure and substrate are surrounded, is recessed for the fluent material for holding inkjet-printing device ejection,
The size for being shaped as the first planar graph S1, S1 of the depression bottom surface of light-emitting zone is determined by equation below：1≤S2 area/
S1 area≤1.5, and S2 and S1 have and occur simultaneously, occur simultaneously for S1, wherein, S2 be inkjet-printing device with test substrate distance
The second plan that the fluent material that single printing sprays under certain height is formed after being dried on the flat surfaces of test substrate
Shape, test substrate is the electrically-conductive backing plate for being not provided with dot structure.
Further, each pixel cell includes multiple sub-pixels, corresponding multiple first plans of multiple light-emitting zones
One or more of the shape S1 shape in circular, ellipse and positive n sides shape, wherein, n is the integer more than or equal to 6.
Further, in the case where light-emitting zone is ellipse, the length 2a and the length of short axle of oval major axis
2b meets equation below：b≤a≤2b.
Further, certain height is the depression of the substrate that nozzle distance has dot structure when inkjet-printing device is printed
The height of bottom surface, preferably certain height are more than or equal to 0.4mm, and less than or equal to 1mm.
Further, the volume of light-emitting zone correspondence depression is V in sub-pixel1, the body for the fluent material that single injection event goes out
Product is V2, then V2≤V1≤10V2, preferably 1pL≤V2≤10pL。
Further, pixel isolation structure is pixel defining layer, and the height of pixel defining layer is more than or equal to 1 μm, and is less than
Equal to 5 μm.
Further, pixel cell includes three sub-pixels, and three sub-pixels are respectively used to glow, green glow and blue light
In any one or more.
Further, positioned at three sub-pixel laid out in parallel of same pixel cell, each pixel cell is arranged in matrix, phase
Distance between adjacent two identical sub-pixels is d, d=25.4mm/R, wherein,R is pixel resolution, and unit is
Per inch pixel, x, y are respectively the number of the pixel cell in transverse and longitudinal direction, and L is that the hypotenuse of rectangular area where matrix is long, L's
Unit is inch.
Further, three sub-pixels positioned at same pixel cell are respectively the first sub-pixel, the second sub-pixel and
Three sub-pixels, the first sub-pixel and the second sub-pixel laid out in parallel are in the first row, the 3rd sub-pixel and the first sub-pixel and second
Sub-pixel Heterogeneous Permutation is in the second row, and the 3rd sub-pixel aligns setting with the centre position of the first sub-pixel and the second sub-pixel.
Further, the corresponding first planar graph S1 of the light-emitting zone of the first sub-pixel and the second sub-pixel is circle,
The corresponding first planar graph S1 of light-emitting zone of 3rd sub-pixel is ellipse；It is preferred that the first sub-pixel and the second sub-pixel are used
In glowing and one kind in green glow, the 3rd sub-pixel is used for blue light-emitting.
According to the second of the application aspect there is provided a kind of photoelectric device, the photoelectric device includes above-mentioned with pixel
The substrate of structure.
According to the 3rd of the application the aspect there is provided a kind of Method of printing, the Method of printing includes：Prepare above-mentioned tool
There is the substrate of dot structure；In the depression that fluent material is printed on to dot structure using inkjet-printing device, fluent material is done
Dry formation film layer.
Using the technical scheme of the application, because the light-emitting zone in the dot structure on substrate has depression, the depression
Fluent material for holding inkjet-printing device ejection, the substrate should with dot structure is applied to inkjet printing, and above-mentioned
Depression bottom surface is shaped as the first planar graph S1, is beaten by inkjet-printing device with single under test substrate distance certain height
The identical fluent material sprayed is printed, the figure formed after being dried on the flat surfaces of the test substrate is the second planar graph
S2, S1 size determines by the second planar graph S2,1≤S2 area/S1 area≤1.5, and S2 and S1 has and occured simultaneously, and hands over
Integrate as S1, then S1 area can all cover S1 close to S2, S2.The light-emitting zone of the substrate with dot structure of the application
Depression bottom surface shape (S1) close to inkjet printing fluent material on the test substrate without dot structure dry paving
The shape (S2) of exhibition, after the fluent material of inkjet printing falls into the light-emitting zone of the depression with dot structure, it is easier to
Light-emitting zone bottom surface nature drawout, and cover whole bottom surface, thus relative to using the larger rectangle of existing length-width ratio or
For the pixel of track type light-emitting zone, it is to avoid the luminescent material sprayed during inkjet printing can not completely be spread in light-emitting zone
Exhibition, or sprawled not higher than non-crossing position in crossover sites luminescent material solid content in multiple dislocation printing luminescent material
Uniform phenomenon, so that the technique that the dot structure of the application is more suitable for inkjet printing prepares luminescent device, realizes raising
The effect of the membrane uniformity of light-emitting zone and the uniformity of luminance of luminescent device, and then solve existing ink-jet printing process institute
Easily there is the problem of film layer is uneven in the luminescent device of preparation.
In addition to objects, features and advantages described above, the application also has other objects, features and advantages.
Below with reference to figure, the application is described in further detail.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.In the accompanying drawings：
Fig. 1 shows the ink-jet printing ink of prior art to the schematic diagram of light-emitting zone；
Fig. 2 shows the schematic diagram of light-emitting zone in a kind of optional dot structure provided herein；And
Fig. 3 shows the schematic diagram of light-emitting zone in another optional pixel cell provided herein.
Wherein, above-mentioned accompanying drawing is marked including the following drawings：
1 ', light-emitting zone；2 ', pixel defining layer；3 ', ink；1st, light-emitting zone；2nd, pixel isolation structure；4th, the first son
Pixel；5th, the second sub-pixel；6th, the 3rd sub-pixel.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the application in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order that those skilled in the art more fully understand application scheme, below in conjunction with the embodiment of the present application
Accompanying drawing, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application part, rather than whole embodiments.Based on the embodiment in the application, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of the application protection
Enclose.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so using
Data can exchange in the appropriate case, so as to embodiments herein described herein.In addition, term " comprising " and " tool
Have " and their any deformation, it is intended that covering is non-exclusive to be included, for example, containing series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps clearly listed or unit, but may include without clear
It is listing to Chu or for the intrinsic other steps of these processes, method, product or equipment or unit.
As described in background technology, easily gone out using the luminescent device prepared by ink-jet printing process in the prior art
The problem of now film layer is uneven.Present applicant is studied regarding to the issue above, it is proposed that one kind has dot structure
Substrate, photoelectric device and Method of printing containing it, in this has the substrate of dot structure, dot structure include one or many
Individual pixel cell, each pixel cell includes one or more sub-pixels, and each sub-pixel includes pixel isolation region and luminous
Pixel isolation structure is provided with region, the corresponding substrate in pixel isolation region, light-emitting zone is pixel isolation structure and substrate
The depression region surrounded, is recessed for the fluent material for holding inkjet-printing device ejection, the depression bottom surface of light-emitting zone
The size for being shaped as the first planar graph S1, S1 determined by equation below：1≤S2 area/S1 area≤1.5, and S2
Have with S1 and occur simultaneously, the common factor is S1, wherein, S2 is that inkjet-printing device is beaten with single under test substrate distance certain height
The figure formed after the aforesaid liquid material sprayed is dried on the flat surfaces of test substrate is printed, tests substrate to be not provided with
The electrically-conductive backing plate of dot structure.
Test substrate in above-described embodiment is compared with the above-mentioned substrate with dot structure, except no dot structure
Outside, other structures are identical, and the surface of test substrate is relative smooth.First planar graph S1 represents the depression of light-emitting zone
The shapes and sizes of bottom surface, the second planar graph S2 represents inkjet-printing device single printing fluid material putting down to test substrate
On smooth surface, the shapes and sizes for the figure that fluent material is formed after drying, wherein, it is printed upon the liquid material on test substrate
Expect identical with the chemical property for the fluent material being printed upon in light-emitting zone correspondence depression, what inkjet-printing device single sprayed
Fluent material volume is identical.
It is above-mentioned that " S2 and S1, which has, to occur simultaneously, and it is to be moved to S1, S2 figure by mathematical method to occur simultaneously for the common factor in S1 "
The intersection region of maximum is can obtain after one plane；The area of the first above-mentioned planar graph S1 is less than the second planar graph S2's
Area, and when S1 and S2 are placed in approximately the same plane, S1 and S2 can be with overlapping, or S1 can be completely covered in S2, in other words,
There may be a state, S1 is in S2, and S1 edges and internal any point surround region (being included in edge) all in S2
Inside.The concave bottom of light-emitting zone can be flat or slightly uneven, and the shape of the bottom surface can be bottom
Face sideline surrounds figure or bottom surface projects corresponding planar graph.
Using the application, because the light-emitting zone in the dot structure on substrate has depression, the depression is used to hold spray
The fluent material that black printing equipment sprays, should substrate with dot structure be applied to inkjet printing, and above-mentioned depression bottom surface
The first planar graph S1 is shaped as, the liquid sprayed is being printed with single under test substrate distance certain height by inkjet-printing device
The figure that body material is formed after being dried on the flat surfaces of the test substrate is the second planar graph S2, S1 size by second
Planar graph S2 determinations, 1≤S2 area/S1 area≤1.5, and S2 and S1, which have, to occur simultaneously, and occurs simultaneously for S1, then S1 face
Product can all cover S1 close to S2, S2.The shape of the depression bottom surface of the light-emitting zone of the substrate with dot structure of the application
(S1) close to the fluent material shape (S2) that drying is sprawled on the test substrate without dot structure of inkjet printing, spray is worked as
The fluent material of ink printing is fallen into after the light-emitting zone of the depression with dot structure, it is easier to spread naturally in light-emitting zone bottom surface
Expansion, and whole bottom surface is covered, so that relative to the picture using the larger rectangle of existing length-width ratio or track type light-emitting zone
Usually say, it is to avoid the luminescent material sprayed during inkjet printing can not completely be sprawled in light-emitting zone, or beaten in multiple dislocation
Uneven phenomenon is sprawled higher than non-crossing position in crossover sites luminescent material solid content when printing and distributing luminescent material, so that this Shen
The technique that dot structure please is more suitable for inkjet printing prepares luminescent device, realizes the membrane uniformity for improving light-emitting zone
With the effect of the uniformity of luminance of luminescent device, and then the luminescent device solved prepared by existing ink-jet printing process easily goes out
The problem of now film layer is uneven.
Drying can be any one or more drying side such as natural drying, vacuum drying and heated drying in above-described embodiment
Formula is combined, and above-mentioned certain height is relevant with the type of the inkjet-printing device of selection, it is preferable that the certain height is more than or equal to
0.4mm, and less than or equal to 1mm.The substrate with dot structure can be more upright rectangular substrate in the application, or
The substrate of the setting dot structure of arbitrary shape, and substrate is not limited to substrate material of the prior art and type, with holding
Loading capability and any material of dot structure can be set to can serve as the material of substrate, can be considered the base in the application
Plate.
Fluent material in above-described embodiment can be for luminous luminescent material, such as quantum dot light emitting material, or
It can be the material for electronics or hole transport, or be the material for electronics or hole injection, fluent material can be with
To prepare the other materials of the film layer of each in luminescent device, those skilled in the art can carry out the choosing of material according to actual needs
Select.
It is pointed out that the second planar graph S2 shapes and sizes and surface energy, the liquid of inkjet printing of test substrate
The chemical property of body material, surface tension and the certain height of printing are relevant, wherein, may in inkjet printing fluent material
Different types of fluent material can be successively printed respectively to the recess of light-emitting zone, and the film with difference in functionality is obtained after drying
Layer.Now, it is determined that the second planar graph S2 shapes and sizes when, be corresponding after multiple fluent materials are dried according to printing
The shapes and sizes of multiple planar graphs are come what is determined, and second planar graph S2 area can select above-mentioned multiple plans
The shape or the closest circular shape of selection of the corresponding figure of area in the middle of the average value of the area of shape, S2 shape selection.
Pixel cell in above-described embodiment can be to be used to isolate each with pixel isolation structure arranged in arrays, above-mentioned
The structure of light-emitting zone, can for pixel defining layer structure or other can stop or weaken light and/or liquid material
The dynamic structure of stream, thus it is miscible between preventing the fluent material of adjacent light-emitting zone, it is also possible to prevent that there is the dot structure
Luminescent device each light-emitting zone formation mixed light.
As shown in Fig. 2 the dot structure includes one or more pixel cells, each pixel cell includes multiple sub- pictures
Element (shows that each pixel cell includes three sub-pixels) in Fig. 2, each sub-pixel includes pixel isolation region 2 and luminous zone
Pixel isolation structure is provided with domain 1, the corresponding substrate in pixel isolation region, light-emitting zone is that pixel isolation structure and substrate enclose
Into depression region, be recessed for holding fluent material, the corresponding multiple first planar graph S1's of multiple light-emitting zones
Shape is selected from circular (as shown in Fig. 2 wherein, S1 is not shown in FIG. 2), ellipse and the one or more just in the shape of n sides, its
In, n is the integer more than or equal to 6.
Using the application, by the corresponding first plane S1 of the light-emitting zone of pixel shape be designed to circular, ellipse or
(n is integer to the positive n sides shape of person, n >=6), compared with existing longer round rectangle, and shape is closer to ink-jet printing ink
The shape that ink droplet tiles naturally on substrate when (fluent material), contributes to ink equably natural after printing to light-emitting zone
Whole pixel light emission region is spread to, the technique that the dot structure is more suitable for inkjet printing prepares luminescent device, realizes and carry
The effect of the membrane uniformity of high light-emitting zone and the uniformity of luminance of luminescent device.
In a preferred embodiment, above-mentioned light-emitting zone can also set ovalisation, if it is oval hair to set 2a
The length of the major axis in light region, 2b is the length of its short axle, and above-mentioned light-emitting zone can be designed to meet to b≤a≤2b shape
Shape, such elliptical region is unlikely to long and is difficult to make fluent material sprawl naturally.It is further preferable that by above-mentioned light-emitting zone
It is designed to circle, i.e. major axis 2b and short axle 2a equal lengths, namely a=b.By using above-described embodiment, by light-emitting zone
Depression bottom surface (i.e. the first planar graph S1) is shaped to be circular or oval, so as to more contribute to inkjet printing
The natural drawout of ink afterwards, and processing technology is simple, reduces production cost.
The shape of light-emitting zone (corresponding first planar graph S1) in above-mentioned each sub-pixel can all be circle, and be
The equal circle of radius, so due to the circular design that the light-emitting zone of each sub-pixel is equal radii, compared to existing
The larger round rectangle design of length-width ratio, is more suitable for fluent material the sprawling naturally in light-emitting zone that inkjet printing gets off,
The batch for being also beneficial to ink jet printing device simultaneously sprays fluent material in light-emitting zone, is more beneficial for batch production.
The above-mentioned dot structure of the application is applied to inkjet-printing device, and the depression that light-emitting zone goes out is used for the liquid material held
What material can spray for inkjet-printing device, the liquid material that the shape of light-emitting zone can be gone out by inkjet-printing device single injection event
Material, determines that flat carrier is the substrate for being not provided with pixel isolation structure in the drying spreading area of flat carrier, preferably lights
Region area is less than or equal to spontaneously dry area.In an optional embodiment, light-emitting zone correspondence depression in sub-pixel
Volume is V1, and the volume for the fluent material that single injection event goes out is V2, then V2≤V1≤10V2, preferably 1pL≤V2≤10pL。
Below to the determination method exhibition of the maximum inner diameter (or area) of the light-emitting zone of the dot structure in above-described embodiment
Issue body introduction：
Maximum inner diameter described above refer to 2 points in the corresponding first planar graph S1 of same light-emitting zone it
Between ultimate range, such as, when the corresponding first planar graph S1 of light-emitting zone is ellipse, maximum inner diameter refers to ellipse
The major axis 2a of shape, when light-emitting zone is circle, maximum inner diameter is circular diameter, when corresponding first plane of light-emitting zone
When figure S1 is positive n sides shape, maximum inner diameter is the external diameter of a circle of the positive n sides shape.It is determined that the maximum of above-mentioned light-emitting zone
During internal diameter, the nozzle of the ink jet printing device for test can be first selected, then with selected nozzle in its normal work
Highly on (certain height now is normal working depth) one melted ink of printing (i.e. aforesaid liquid material) to test substrate,
After after melted ink drying, with micro- sem observation actual drying shape, this is shaped as the second planar graph S2, then measures reality
The maximum inner diameter or area of shape (i.e. the second planar graph S2) are dried, such as the actual drying shape (the second planar graph) is
Circle, then measure the diameter length D of circle, designs luminous in the substrate with dot structure finally according to the D measured
The size in region (i.e. the first planar graph S1), can design the corresponding first planar graph S1 of light-emitting zone diameter 2a≤D,
And 1≤S2 area/S1 area≤1.5, and S2 and S1 have and occur simultaneously, occur simultaneously for S1, so contribute to the nature of ink droplet
Tiling, and overcome strip pixel two and sprawl defect less than drop, it is adaptable to inkjet printing methods prepare film layer, improve
Uniformity prepared by film layer.More preferred, the diameter 2a of light-emitting zone will be entered with the ink droplet that can spray inkjet printing
Enter and be preferred to inside light-emitting zone, namely the maximum inner diameter of light-emitting zone is less than or equal to the maximum inner diameter that ink droplet falls, wherein, hair
Light region is arranged in pixel isolation structure, and pixel isolation structure can be pixel defining layer, and preferred pixel defines the height of layer
It could be arranged to 1 micron to 5 microns.
In an optional embodiment, three sub-pixels can be included in pixel cell, three sub-pixels are respectively used to
Glow, any one or more in green glow and blue light.Such as, three sub-pixels can be respectively to be used to launching the of feux rouges
One sub-pixel (red pixel structure R), the second sub-pixel (green pixel structure G) for launching green glow and for launching blue light
The 3rd sub-pixel (blue pixel structure B).
Positioned at three sub-pixel laid out in parallel of same pixel cell, each pixel cell is arranged in matrix, two neighboring phase
With the distance between sub-pixel be d, this apart from d=25.4mm/R,Wherein, R is pixel resolution, and unit is
Ppi (Pixel per inch, per inch pixel), x, y are respectively the number of the pixel cell in transverse and longitudinal direction, and L is matrix place
The hypotenuse of rectangular area is long, and L unit is inch.
For example when wanting the pixel that print resolution is 100dpi, adjacent the first sub-pixel glowed along x and y directions away from
From being all 0.254mm, wherein, what print pixel referred to is exactly by ink printed in the depression of the light-emitting zone into sub-pixel.
In an optional embodiment, a drop or many melted inks can be printed in the light-emitting zone of dot structure.It is false
If the volume of above-mentioned light-emitting zone is V1, the volume for often dripping ink droplet is V2, then have V2≤V1≤10V2, namely sub-pixel luminous zone
Domain can at least accommodate 1 to 10 melted ink.
The design method of the corresponding substrate of above-mentioned light-emitting zone is applied to the substrate manufacture of a variety of type of drive, both can be with
Active-matrix (Active Matrix) substrate is readily applicable to suitable for passive matrix (Passive Matrix),
Wherein, passive matrix can be passive organic luminuous dipolar object (Passive Matrix Organic Light
Emitting Diode, PM-OLED) or passive type light emitting diode with quantum dots (PM-QLED), including tri- sub-pixels of RGB,
And these three pixels are arranged in array, its structure can be as shown in Figure 2.
In addition, the substrate corresponding to above-mentioned light-emitting zone applies also for active-matrix organic light emitting diode (AMOLED) panel
(Active Matrix/Organic Light Emitting Diode, AM-OLED) or active light emitting diode with quantum dots
(AM-QLED), AM-OLED is without materials such as backlight module and colored filters.
When substrate uses AM-OLED, the arrangement architecture of three sub-pixels in pixel cell can be according to actual needs
Any adjusted design is carried out, in order to improve the resolution ratio of pixel, in a preferred embodiment, three sons in pixel cell
The arrangement architecture of pixel can be as follows：It is respectively the first sub-pixel, the second sub- picture positioned at three sub-pixels of same pixel cell
Element and the 3rd sub-pixel, the first sub-pixel and the second sub-pixel can be with laid out in parallel in the first row, the 3rd sub-pixel and the first son
Pixel and the second sub-pixel Heterogeneous Permutation are in the second row, the centre position of the 3rd sub-pixel and the first sub-pixel and the second sub-pixel
Alignment is set.Now, sub-pixel is with " product " word or " product " the word Structural assignments that fall in pixel cell, and sub-pixel can be according to need
It is arbitrarily designated.The shape of corresponding first planar graph of light-emitting zone of above three sub-pixel can be circular, ellipse
Or the one or more in positive n deformations, n >=6, in order to improve the illumination effect of pixel cell, in an optional embodiment,
The corresponding first planar graph S1 of light-emitting zone of first sub-pixel and the second sub-pixel is circle, the luminous zone of the 3rd sub-pixel
The corresponding first planar graph S1 in domain is ellipse；It is preferred that the first sub-pixel and the second sub-pixel are used to glow and green glow, the
Three sub-pixels are used for blue light-emitting.
As shown in figure 3, can be by R and G sub-pixel (glowing and the first sub-pixel 4 of green glow and the second sub-pixel 5)
A line is arranged on, it is all rounded, B sub-pixels (i.e. the 3rd sub-pixel 6 of blue light-emitting) are arranged on RG sub-pixels (the first sub-pixel
4 and second sub-pixel 5) lower section, and B sub-pixels can be arranged to ellipsoidal structure, can pass through above-mentioned pixel light emission region
Set-up mode, adjust the accounting of each pixel, setting be adjusted according to actual luminous situation.
By above-described embodiment, by the way of the light-emitting zone of sub-pixel is diminished, the effect easily sprawled is realized,
And after the area of tool light-emitting zone diminishes, the setting quantity of dot structure relative can become many, due to the formula of pixel resolution
Understand, in same size region, it is more that dot structure quantity is set, and resolution ratio is bigger, so that the setting in above-described embodiment
Mode also contributes to pixel resolution, wherein, pixel resolution formula is as follows：
Wherein, R is pixel resolution, and unit is ppi (Pixel per inch, per inch pixel), and x, y are transverse and longitudinal respectively
The number of the pixel cell in direction, L is hypotenuse length (inches).
Using the substrate with dot structure of the application, the first planar graph S1 of ingehious design light-emitting zone correspondence shape
The arrangement mode of shape, size and sub-pixel, enables the ink of inkjet printing uniformly to be sprawled in the light-emitting zone of substrate, saves
The complicated technology of follow-up uniform film layer, fundamentally solves existing ink-jet printing process institute by the way of relatively simple
Easily there is the problem of film layer is uneven in the luminescent device of preparation, realizes the membrane uniformity and photophore for improving light-emitting zone
The effect of the uniformity of luminance of part.
According to further aspect of the application, a kind of photoelectric device is additionally provided, the photoelectric device includes above-mentioned each implementation
The substrate with dot structure of example.
Photoelectric device in above-described embodiment can be luminescent device, such as electroluminescent device or photo luminescent devices,
Display or lighting field can be used in, but is not limited to the above-mentioned field enumerated, other are related to the device in the field of dot structure
Part is equally applicable.
By above-described embodiment, because the light-emitting zone in the dot structure on substrate has depression, the depression is used to contain
The fluent material of inkjet-printing device ejection is put, the substrate should with dot structure is applied to inkjet printing, and above-mentioned depression bottom
Face is shaped as the first planar graph S1, is sprayed by inkjet-printing device with single printing under test substrate distance certain height
Fluent material dried on the flat surfaces of the test substrate after the figure that is formed for the second planar graph S2, S1 size by
Second planar graph S2 determinations, 1≤S2 area/S1 area≤1.5, and S2 and S1, which have, to occur simultaneously, and occurs simultaneously for S1, then S1
Area can all cover S1 close to S2, S2.The depression bottom surface of the light-emitting zone of the substrate with dot structure of the application
Shape (S1) dries the shape (S2) sprawled close to the fluent material of inkjet printing on the test substrate without dot structure,
After the fluent material of inkjet printing falls into the light-emitting zone of the depression with dot structure, it is easier in light-emitting zone bottom surface certainly
Right drawout, and whole bottom surface is covered, so that relative to using existing length-width ratio larger rectangle or track type light-emitting zone
Pixel for, it is to avoid the luminescent material sprayed during inkjet printing can not completely be sprawled in light-emitting zone, or multiple wrong
Uneven phenomenon is sprawled higher than non-crossing position in crossover sites luminescent material solid content during the printing luminescent material of position, so that
The technique that the dot structure of the application is more suitable for inkjet printing prepares luminescent device, and the film layer for realizing raising light-emitting zone is equal
The effect of the uniformity of luminance of even property and luminescent device, and then solve the appearance of the luminescent device prepared by existing ink-jet printing process
Easily there is the problem of film layer is uneven.
According to the 3rd of the application the aspect, a kind of Method of printing is additionally provided, the Method of printing comprises the following steps：It is accurate
The substrate with dot structure in standby the various embodiments described above；Fluent material is printed on into dot structure using inkjet-printing device
Depression in, fluent material is dried to form film layer.
Fluent material in above-described embodiment can be for luminous luminescent material, such as quantum dot light emitting material, or
It can be the material for electronics or hole transport, or be the material for electronics or hole injection, fluent material can be with
To prepare the other materials of the film layer of each in luminescent device, those skilled in the art can carry out the choosing of material according to actual needs
Select.Above-mentioned film layer can be the film layer in display field, lighting field, the device of area of solar cell.
In an optional embodiment, in the depression that fluent material is printed on to dot structure using inkjet-printing device
Before, Method of printing also includes：The relative position of inkjet-printing device and substrate is adjusted, it is further preferable that adjustment inkjet printing
The distance of the nozzle of device to substrate is certain height, wherein, the nozzle when certain height can be for inkjet-printing device printing
Distance has the height of the depression bottom surface of the substrate of dot structure.
By above-mentioned Method of printing, as a result of the substrate for the dot structure for being more applicable for inkjet-printing device,
When setting fluent material using inkjet-printing device, fluent material is easier to sprawl naturally in the light-emitting zone of pixel isolation structure
Open, so that the fluent material printed is sprawled more uniformly after drying, improve the uniformity of film layer, and then improve including this
The uniformity of luminance of the photoelectric device of film layer prepared by method.
The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (12)
1. a kind of substrate with dot structure, the dot structure includes one or more pixel cells, each pixel
Unit includes one or more sub-pixels, and each sub-pixel includes pixel isolation region and light-emitting zone, the pixel every
Pixel isolation structure is provided with substrate corresponding from region, the light-emitting zone is the pixel isolation structure and the substrate
The depression region surrounded, it is characterised in that
It is described to be recessed for the fluent material for holding inkjet-printing device ejection, the shape of the depression bottom surface of the light-emitting zone
Shape is the first planar graph S1, and the size of the S1 is determined by equation below：1≤S2 area/S1 area≤1.5, and S2
Have with S1 and occur simultaneously, the common factor is S1,
Wherein, the S2 is that the inkjet-printing device is printed described in ejection with single under test substrate distance certain height
The second planar graph that fluent material is formed after being dried on the flat surfaces of the test substrate, the test substrate is not set
It is equipped with the electrically-conductive backing plate of dot structure.
2. the substrate according to claim 1 with dot structure, it is characterised in that each pixel cell includes many
Individual sub-pixel, the corresponding multiple first planar graph S1 of multiple light-emitting zones shape is selected from circular, ellipse and positive n sides
One or more in shape, wherein, n is the integer more than or equal to 6.
3. the substrate according to claim 2 with dot structure, it is characterised in that in the light-emitting zone be ellipse
In the case of, the length 2a of the oval major axis and the length 2b of short axle meet equation below：b≤a≤2b.
4. the substrate according to claim 1 with dot structure, it is characterised in that the certain height is the ink-jet
There is the height of the depression bottom surface of the substrate of dot structure, preferably described certain height when printing equipment is printed described in nozzle distance
More than or equal to 0.4mm, and less than or equal to 1mm.
5. the substrate according to claim 1 with dot structure, it is characterised in that light-emitting zone pair in the sub-pixel
The volume that should be recessed is V1, the volume for the fluent material that the single injection event goes out is V2, then V2≤V1≤10V2, preferably 1pL≤V2
≤10pL。
6. the substrate according to claim 1 with dot structure, it is characterised in that the pixel isolation structure is pixel
Layer is defined, the height of the pixel defining layer is more than or equal to 1 μm, and less than or equal to 5 μm.
7. the substrate according to claim 1 or 2 with dot structure, it is characterised in that the pixel cell includes
Three sub-pixels, three sub-pixels are respectively used to glow, any one or more in green glow and blue light.
8. the substrate according to claim 7 with dot structure, it is characterised in that positioned at described in same pixel cell
Three sub-pixel laid out in parallel, each pixel cell is arranged in matrix, and the distance between two neighboring identical sub-pixel is d, d=
25.4mm/R,
<mrow>
<mi>R</mi>
<mo>=</mo>
<mfrac>
<msqrt>
<mrow>
<msup>
<mi>x</mi>
<mn>2</mn>
</msup>
<mo>+</mo>
<msup>
<mi>y</mi>
<mn>2</mn>
</msup>
</mrow>
</msqrt>
<mi>L</mi>
</mfrac>
<mo>,</mo>
</mrow>
Wherein, R is pixel resolution, and unit is per inch pixel, and x, y are respectively the number of the pixel cell in transverse and longitudinal direction, and L is
The hypotenuse of rectangular area is long where the matrix, and the unit of the L is inch.
9. the substrate according to claim 7 with dot structure, it is characterised in that positioned at three of same pixel cell
Sub-pixel is respectively the first sub-pixel, the second sub-pixel and the 3rd sub-pixel, first sub-pixel and second sub-pixel
Laid out in parallel is in the first row, and the 3rd sub-pixel is with first sub-pixel and the second sub-pixel Heterogeneous Permutation in second
OK, the 3rd sub-pixel aligns setting with the centre position of first sub-pixel and second sub-pixel.
10. the substrate according to claim 9 with dot structure, it is characterised in that first sub-pixel and second
The corresponding first planar graph S1 of light-emitting zone of sub-pixel is circle, the light-emitting zone corresponding first of the 3rd sub-pixel
Planar graph S1 is ellipse；It is preferred that first sub-pixel and second sub-pixel are used to glow and one in green glow
Kind, the 3rd sub-pixel is used for blue light-emitting.
11. a kind of photoelectric device, it is characterised in that including the dot structure that has any one of claim 1 to 10
Substrate.
12. a kind of Method of printing, it is characterised in that including：
Prepare the substrate with dot structure as any one of claim 1 to 10；
In the depression that fluent material is printed on to the dot structure using inkjet-printing device, the fluent material is dried to be formed
Film layer.
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| CN113327967A (en) * | 2021-06-01 | 2021-08-31 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| CN113593428A (en) * | 2021-07-20 | 2021-11-02 | Tcl华星光电技术有限公司 | Display panel and electronic device |
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